Influence of pressure and position of first nozzle and spinning speed on the properties of acrylic MJS']JS yarns

The effect of pressure and position of first nozzle and spinning speed on the properties of acrylic MJS yarns has been studied. It is observed that the first nozzle pressure has the highest influence on the yarn properties followed by the spinning speed. Higher first nozzle pressure significantly improves the yarn tenacity and breaking extension but adversely affects the yarn regularity, residual shrinkage and flexural rigidity. The less rigid yarns are produced with a low spinning speed and a small gap between the first nozzle and the nip of front roller.